OP NEW SOUTH WALES. 91 



kind of distinct band which is not nacreous, greenish and 

 spotted with brown ; the columella is flattened and without a 

 tooth. This Troclius is yellowish, or whitish, with wide longi- 

 tudinal wavy undulating stripes, reddish or brownish in colour. 

 They extend the whole length of the shell, and are taken up at 

 each whorl from the suture. The colour of the animals, eyes, 

 tentacles, under part of the foot, laminated fringes and eight 

 tentacles is pale greenish ; the mouth is black above and yellow at 

 the point, capable of much dilatation, and fringed below ; the 

 foot is black laterally with a transverse green band ; the opercu- 

 lum is round and somewhat large. This Troclius is found in com- 

 pany with T.multicarinata, with which it must not be confounded. 

 Its conical form distinguish it more easily than its stripes, for 

 there are varieties of T. multicarinota which have also reddish 

 stripes. Length, 1 inch 2 lines; diameter of base, 11| lines." 



The plate accompanying this description is a large Troclio- 

 cochlea constricta, with brown oblique bands very, plainly marked 

 on a yellow ground. 



The authors then go on to describe T. midticarinata, which I 

 think will evidently appear from their description to be no more 

 than a variety — if indeed a variety — of Trochocochlea constricta 

 of Lamarck, described in another place (Anim. s. verteb., torn. 7, 

 jp. 36, No. 15) as Monodonta multicarinata. First they give L.'s 

 diagnosis, then add — " There are varieties of shape and colour 

 in this shell which would make it pass insensibly into the pre- 

 ceding species, although the extremes differ. But we do not 

 hesitate to consider it as a species whose type is shorter, more 

 circular and dilated at the base, with a sharper spire than the 

 striped Troclius. Its keels, which very regularly amount to 

 seven on the last whorl, are separated by deep channels. Its 

 aperture is semi-circular, white, with only two or three keels, and 

 on its limb (outer lip ?) which is smooth, a black line. The 

 shell is dull yellowish, and sometimes covered with red or brown 

 zigzag flames, then it resembles the preceding. The animal has 

 long pointed greenish tentacles, dotted with black ; the stalks of 

 the eyes are triangular, black, like the sides of the feet and the 



